ethinyl estradiol

Definition of ethinyl estradiol

: a very potent synthetic estrogen C₂₀H₂₄O₂ used especially as an oral contraceptive

Examples of ethinyl estradiol in a Sentence

Recent Examples on the Web Taytulla, also called ethinyl estradiol, gained Food and Drug Administration approval in 2013. — Austen Hufford, WSJ, "Allergan Recalls Taytulla Birth-Control Packs After Pills Placed Out of Order," 29 May 2018 Tyler’s experiments looked at one type of synthetic estrogen: ethinyl estradiol, or EE2, which is found in oral contraceptives like TriNessa and Seasonique. — Becky Little, Smithsonian, "How One Bad Science Headline Can Echo Across the Internet," 31 July 2017 One environmental estrogen is ethinyl estradiol—a chemical found in birth control pills. — National Geographic, "Why Are These Male Fish Growing Eggs?," 3 Feb. 2016

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Cite this Entry

“Ethinyl estradiol.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/ethinyl%20estradiol. Accessed 29 January 2020.

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More Definitions for ethinyl estradiol

ethinyl estradiol

noun

variants: or ethynylestradiol \ ˌeth-ə-nil-ˌes-trə-ˈdī-ˌȯl

, -ˌōl

\ or chiefly British ethinyloestradiol or ethynyloestradiol \ ˌeth-ə-nil-ˌē-strə-ˈdī-ˌȯl

How to pronounce ethynyloestradiol (audio)

, -ē-ˈstrad-ē-ˌȯl

, -ˌōl \

Medical Definition of ethinyl estradiol

: a white crystalline very potent synthetic estrogen C₂₀H₂₄O₂ prepared from estrone and used in combination (as with norgestrel or norethindrone) as a birth control pill or alone in the treatment of menopausal symptoms or female hypogonadism or in the palliative treatment of prostate or breast cancer — see loestrin, minastrin, nuvaring, ortho evra, ortho-novum, ortho tri-cyclen, seasonale, seasonique, yasmin, yaz